Class

Question

class a:
def __init__(self):
pass

def c(self,d):
d = print
a = a()
a.c(('Hello!'))

why it prints nothing?

Answer 1

You should replace:
d = print
with:
print(d)

It will work then.

Answer 2

class a:
def __init__(self):
pass

def c(self,d):
print(d)
x = a()
x.c('Hello!')

Also you should create an object with a different name of "a" because "a" is already the name of the class and so there might be conflicts between a the class and a the object.